Can fasting cause headache

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Can fasting cause headache?

A generalized mild to moderate nonpulsating headache can occur during a fast of at least 8 hours and is relieved after eating (occurs in 47% after a 15-hour fast in one study).

Sources

Lagman-Bartolome AM, Gladstone J: Metabolic headaches. Neurol Clin 32(2):451-469, 2014.

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